From: Cyril Hrubis <chrubis@suse.cz>
To: Ricardo Branco <rbranco@suse.de>
Cc: ltp@lists.linux.it
Subject: Re: [LTP] [PATCH] userfaultfd: Add test using UFFDIO_POISON
Date: Fri, 6 Feb 2026 15:47:42 +0100 [thread overview]
Message-ID: <aYX_DueFX9WiLHSu@yuki.lan> (raw)
In-Reply-To: <20260205205609.147851-1-rbranco@suse.de>
Hi!
> +static void run(void)
> +{
> + pthread_t thr;
> + struct uffdio_api uffdio_api = {};
> + struct uffdio_register uffdio_register;
> + struct sigaction sa = {};
> + volatile char dummy;
> +
> + sa.sa_handler = sigbus_handler;
> + sigemptyset(&sa.sa_mask);
> + SAFE_SIGACTION(SIGBUS, &sa, NULL);
> +
> + set_pages();
> +
> + uffd = SAFE_USERFAULTFD(O_CLOEXEC | O_NONBLOCK, false);
> +
> + uffdio_api.api = UFFD_API;
> + uffdio_api.features = UFFD_FEATURE_POISON;
> +
> + SAFE_IOCTL(uffd, UFFDIO_API, &uffdio_api);
> +
> + uffdio_register.range.start = (unsigned long) page;
> + uffdio_register.range.len = page_size;
> + uffdio_register.mode = UFFDIO_REGISTER_MODE_MISSING;
> +
> + SAFE_IOCTL(uffd, UFFDIO_REGISTER, &uffdio_register);
> +
> + SAFE_PTHREAD_BARRIER_INIT(&barrier, NULL, 2);
Why does this test need barriers and the rest of the tests that looks
nearly the same does not?
--
Cyril Hrubis
chrubis@suse.cz
--
Mailing list info: https://lists.linux.it/listinfo/ltp
next prev parent reply other threads:[~2026-02-06 14:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-05 20:56 [LTP] [PATCH] userfaultfd: Add test using UFFDIO_POISON Ricardo Branco
2026-02-06 14:47 ` Cyril Hrubis [this message]
2026-02-06 15:47 ` Ricardo Branco
2026-02-06 14:47 ` Petr Vorel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=aYX_DueFX9WiLHSu@yuki.lan \
--to=chrubis@suse.cz \
--cc=ltp@lists.linux.it \
--cc=rbranco@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox